Processor / MCU
Key selection specSource: general guidance
8-bit AVR to multi-core ARM / x86 SBC
Compute headroom for control loops and vision.
SBC ≠ hard real-time motor controller without architecture.
Controller boards
MCU and SBC boards that generate control signals, read sensors, and run robot software — Arduino, ESP32, Raspberry Pi, Teensy, and competition controllers.
COMPONENTS DIRECTORY//PART::CONTROLLER-BOARDS
Qualitative pricing onlyWidely availableProcurement: LowOvernight availability: needs live supplier verificationSource: Partially verified
Controller boards category hero
Verified media required — not AI product evidence. Photo Archivist / official sources only.
Placeholder — final asset pendingA printed circuit board with a microcontroller or single-board computer, voltage regulators, I/O headers, and often USB — the compute and GPIO layer of a robot.
The controller board is the robot's brain — it runs your code and sends signals to motors and servos, but it usually needs separate driver boards to move big motors safely.
MCU boards offer deterministic GPIO and hardware timers for PWM; SBCs offer Linux and vision at the cost of hard real-time unless you offload motion to a coprocessor or MCU.
Runs control loops, reads sensors, commands servos and drivers, and hosts firmware or ROS nodes depending on platform.
- →PWM servo multiplexing
- →I2C/SPI sensor aggregation
- →Wi-Fi teleop on ESP32
- →ROS 2 on Raspberry Pi
- →Competition autonomous periods
- •Arduino-class edu robots
- •ESP32 mobile and arm kits
- •Raspberry Pi ROS prototypes
- •FTC/FRC/VEX competition robots
- •Research testbeds before industrial controllers
Qualitative spec selection guide — not live product values. Verify exact numbers on the manufacturer datasheet before ordering.
SKU-level comparison is not available yet — use this table to decide what to verify before ordering.
14 selection specs · 9 key for buying decisions
| Spec | Why it matters | Buyer warning |
|---|---|---|
Processor / MCU Key selection spec 8-bit AVR to multi-core ARM / x86 SBC | Compute headroom for control loops and vision. | SBC ≠ hard real-time motor controller without architecture. |
Clock speed Optional detail | Loop rate and peripheral timing. | Marketing clock ≠ usable control bandwidth. |
RAM / memory Optional detail | ROS, vision, and buffer sizes on SBCs. | Underspec Pi RAM for vision stacks. |
GPIO count Key selection spec | Sensors, drivers, and interrupts needed. | Count usable pins after strapping/reserved. |
PWM outputs Key selection spec | One hardware PWM per servo unless expander. Beginner: Count servos vs hardware timer channels on the pinout. | Bit-banged PWM jitters on holding torque. |
ADC inputs Optional detail | Analog sensors and current sense. | Reference voltage affects readings. |
UART / I2C / SPI / CAN / USB Key selection spec | Sensor and smart actuator bus compatibility. | Pi may need level shifters on 5 V buses. |
Logic voltage V Key selection spec 3.3 V logic; 5 V tolerant pins vary | Must match peripherals and drivers. | 3.3 V MCU with 5 V-only sensors needs shifter. |
Input voltage (VIN) V Key selection spec USB 5 V; VIN 7–12 V common on MCUs | Regulator heat and mobile battery range. | VIN is not a servo power rail. |
Current limits Key selection spec GPIO mA; 5 V rail often <1 A | Onboard rails cannot feed servos/motors. Beginner: The board brain is not the robot power plant — plan separate rails. | Servo stall through 5 V pin resets board. |
Software support Key selection spec | Library ecosystem and team skill fit. | Closed competition ecosystems limit libraries. |
Arduino / Python / C++ Optional detail | Development path and examples. | Verify core support for clone boards. |
ROS support Optional detail | Research stacks on SBCs; micro-ROS on MCUs. | ROS on Pi still needs motor offload for timing. |
Documentation quality Key selection spec | Debug time dominates small projects. | Missing errata on pin conflicts wastes hours. |
Clock speed
Optional detailSource: general guidance
Loop rate and peripheral timing.
Marketing clock ≠ usable control bandwidth.
RAM / memory
Optional detailSource: general guidance
ROS, vision, and buffer sizes on SBCs.
Underspec Pi RAM for vision stacks.
GPIO count
Key selection specSource: general guidance
Sensors, drivers, and interrupts needed.
Count usable pins after strapping/reserved.
PWM outputs
Key selection specSource: general guidance
One hardware PWM per servo unless expander.
Bit-banged PWM jitters on holding torque.
Beginner: Count servos vs hardware timer channels on the pinout.
ADC inputs
Optional detailSource: general guidance
Analog sensors and current sense.
Reference voltage affects readings.
UART / I2C / SPI / CAN / USB
Key selection specSource: general guidance
Sensor and smart actuator bus compatibility.
Pi may need level shifters on 5 V buses.
Logic voltage
V
Key selection specSource: general guidance
3.3 V logic; 5 V tolerant pins vary
Must match peripherals and drivers.
3.3 V MCU with 5 V-only sensors needs shifter.
Input voltage (VIN)
V
Key selection specSource: general guidance
USB 5 V; VIN 7–12 V common on MCUs
Regulator heat and mobile battery range.
VIN is not a servo power rail.
Current limits
Key selection specSource: general guidance
GPIO mA; 5 V rail often <1 A
Onboard rails cannot feed servos/motors.
Servo stall through 5 V pin resets board.
Beginner: The board brain is not the robot power plant — plan separate rails.
Software support
Key selection specSource: general guidance
Library ecosystem and team skill fit.
Closed competition ecosystems limit libraries.
Arduino / Python / C++
Optional detailSource: general guidance
Development path and examples.
Verify core support for clone boards.
ROS support
Optional detailSource: general guidance
Research stacks on SBCs; micro-ROS on MCUs.
ROS on Pi still needs motor offload for timing.
Documentation quality
Key selection specSource: general guidance
Debug time dominates small projects.
Missing errata on pin conflicts wastes hours.
Additional key specs (seed data)
MCU / processor
8-bit AVR to multi-core ARM / x86 SBC
Determines compute headroom for control loops and vision.
I/O count
Digital, analog, interrupt-capable pins
One PWM per servo unless PCA9685 or similar co-processor.
PWM outputs
Hardware timers vs bit-banged
Jitter affects servo holding; hardware PWM preferred.
Motor driver support
Often external — onboard only on integrated shields
Do not drive wheel motors directly from GPIO.
Voltage input
USB 5 V, VIN 7–12 V, 3.3 V logic rails
Regulator heat and servo rail separation.
Current limits
Per-pin mA; total 3.3 V / 5 V rail amps
Servo stall current must not flow through MCU regulator.
Communication ports
UART, I2C, SPI, CAN, USB
Sensor and smart servo bus compatibility.
Software support
Arduino, MicroPython, ESP-IDF, ROS 2
Library ecosystem speeds integration.
ROS compatibility
Native on SBCs; micro-ROS on MCUs
Research stacks vs bare-metal timing.
Documentation quality
Pinout clarity, examples, errata
Debug time dominates small projects.
- Separate power for servos vs logic
- Hardware PWM channel count
- Logic level (3.3 V vs 5 V tolerant)
- Real-time needs vs Linux SBC
- ROS support if using Nav2 / MoveIt
Prices vary by model, supplier, quantity, availability, and shipping speed. EAR pricing bands are guidance only unless tied to a sourced product record. Verify current pricing before ordering.
Prices vary by model, supplier, quantity, availability, and shipping speed. EAR pricing bands are guidance only unless tied to a sourced product record. Verify current pricing before ordering.
Basic microcontroller boards
basic_mcu
Qualitative guidance onlyNeeds review
Entry MCU boards anchor many student and maker robots. Official board vs clone, header population, and regional shipping dominate perceived cost.
Typical buyer
Makers, coursework, simple motor/sensor prototypes.
Examples
Arduino Uno/Nano class, ESP32 dev kits, STM32 Nucleo-style boards.
What affects cost
- →Official vs clone board
- →On-board sensors and wireless module
- →Header soldered vs bare
- →Distributor vs marketplace seller
Price usually excludes
power supplycontroller/drivercables/connectorsmounting hardwareshippingtaxes/tariffssoftware/licenseintegration timesupport/warranty plan
Buyer caution
Clone boards may differ in USB chip, voltage regulator, or pinout docs. Verify before assuming tutorial compatibility.
Source basis
Category-level qualitative guidance — no SKU-linked distributor band yet.
Open research gaps
- Sourced USD band — Arduino/ESP32-class dev boards — No sourced numeric band in EAR. Next: Distributor listing spot-check (Digi-Key, Mouser, Pololu, OEM)
Verify current pricing with supplier before ordering.
Robotics controller boards
robotics_controller
Qualitative guidance onlyNeeds review
Purpose-built robotics controllers combine motor outputs, servo headers, and sometimes IMU or RC inputs. Price scales with channel count and onboard power regulation.
Typical buyer
Competition teams, mobile robot builders, RC-to-autonomous conversions.
Examples
RoboClaw-adjacent hosts, dedicated multi-motor robot shields, competition control hubs.
What affects cost
- →Motor/servo channel count and current capacity
- →Onboard IMU, RC input, or telemetry
- →Vendor support and firmware maturity
- →Bundle vs bare board
Price usually excludes
power supplycontroller/drivercables/connectorsmounting hardwareshippingtaxes/tariffssoftware/licenseintegration timesupport/warranty plan
Buyer caution
Channel current sums matter more than board headline price. Confirm your worst-case stall current fits the board and external power plan.
Source basis
Category-level qualitative guidance — no SKU-linked distributor band yet.
Open research gaps
- Sourced USD band — multi-motor robotics controller boards — No sourced numeric band in EAR. Next: Distributor listing spot-check (Digi-Key, Mouser, Pololu, OEM)
Verify current pricing with supplier before ordering.
Single-board computers
sbc
Qualitative guidance onlyNeeds review
SBCs for robots (Pi-class, Jetson-adjacent at lower tiers) vary by RAM, wireless, and authorized vs gray-market availability.
Typical buyer
ROS learners, vision rovers, edge nodes running Linux.
Examples
Raspberry Pi class, other ARM SBCs used as robot brains.
What affects cost
- →RAM and wireless variant
- →Authorized distributor vs marketplace scalper pricing
- →Kit vs board-only
- →Regional supply constraints
Price usually excludes
power supplycontroller/drivercables/connectorsmounting hardwareshippingtaxes/tariffssoftware/licenseintegration timesupport/warranty planmicroSD/storagecamera moduleactive cooling kit
Buyer caution
Marketplace SBC pricing swings with supply cycles. Verify authorized seller and model revision — not all SBCs run the same ROS stack out of the box.
Source basis
Category-level qualitative guidance — no SKU-linked distributor band yet.
Open research gaps
- Sourced USD band — Raspberry Pi / ARM SBC robotics hosts — No sourced numeric band in EAR. Next: Distributor listing spot-check (Digi-Key, Mouser, Pololu, OEM)
Verify current pricing with supplier before ordering.
Edge AI / vision compute boards
edge_ai
Qualitative guidance onlyNeeds review
GPU/NPU-capable edge boards carry higher unit cost plus camera, carrier, and power accessories. Software stack and cooling often exceed board BOM in integration time.
Typical buyer
Perception-heavy robots, AMR prototypes, research platforms.
Examples
Jetson-class modules with carrier boards, Coral/USB accelerators on host SBCs.
What affects cost
- →Compute tier (module vs dev kit)
- →Carrier, camera, and storage bundle
- →Power supply wattage class
- →Enterprise vs dev-kit channel
Price usually excludes
power supplycontroller/drivercables/connectorsmounting hardwareshippingtaxes/tariffssoftware/licenseintegration timesupport/warranty plancamera modulecarrier boardactive coolingAI software licenses
Buyer caution
Dev kit pricing does not equal production module pricing. Confirm thermal and power budget before treating dev-kit cost as BOM.
Source basis
Category-level qualitative guidance — no SKU-linked distributor band yet.
Open research gaps
- Sourced USD band — Jetson/Coral-class edge AI kits — No sourced numeric band in EAR. Next: Distributor listing spot-check (Digi-Key, Mouser, Pololu, OEM)
Verify current pricing with supplier before ordering.
Industrial controllers / PLC-adjacent
industrial_plc
Qualitative guidance onlyNeeds review
PLC, PAC, and industrial IPC pricing is quote-driven with I/O modules, licensing, and safety architecture. EAR does not publish bands without sourced distributor or OEM records.
Typical buyer
Factory automation integrators, machine OEMs, certified safety systems.
Examples
PLC CPUs with I/O racks, industrial IPCs, safety-rated controllers.
What affects cost
- →Safety rating and SIL/PL class
- →I/O count and fieldbus modules
- →Software licenses and support contracts
- →Volume and integrator channel
Price usually excludes
power supplycontroller/drivercables/connectorsmounting hardwareshippingtaxes/tariffssoftware/licenseintegration timesupport/warranty planI/O modulessafety PLC licensingengineering commissioning
Buyer caution
Do not compare industrial controller quotes to maker board listings. Lifecycle, certification, and spare support dominate TCO.
Source basis
Category-level qualitative guidance — no OEM quote verified in EAR.
Open research gaps
- Sourced USD band — entry industrial PLC/IPC bundles — No sourced numeric band in EAR. Next: Distributor listing spot-check (Digi-Key, Mouser, Pololu, OEM)
Verify current pricing with supplier before ordering.
Representative product records for orientation — not endorsements.
EAR compatibility guidance is category-level unless a specific product record is sourced. Always verify voltage, current, connectors, signal type, documentation, and manufacturer limits before ordering.
EAR compatibility guidance is category-level unless a specific product record is sourced. Always verify voltage, current, connectors, signal type, documentation, and manufacturer limits before ordering.
General guidanceConfidence: mediumSource: partially verified
Build chains
Controller board chain
- →Board logic voltage matters.
- →I/O count matters.
- →PWM, UART, I2C, SPI, CAN, USB support matters.
- →Raspberry Pi-style SBCs often need motor driver hats/boards.
- →Arduino/ESP32-style boards are good for direct hardware control but have different compute limits.
Works with
Required companion parts
- →Motor drivers for DC/stepper wheel motors (not for integrated hobby servos)
- →Separate power regulation for servo/motor rails
- →USB cable or programming adapter
Optional companion parts
- →Sensors (IMU, encoders, cameras)
- →Communication modules (Wi-Fi, Bluetooth, CAN hat)
- →Level shifters for mixed 3.3 V / 5 V peripherals
Common interfaces
GPIO headersArduino shield headersUSBRaspberry Pi HAT
PWMI2CSPIUARTCAN (on specialized boards)USB serial
Voltage / current / power
- →Board logic voltage matters — 3.3 V vs 5 V tolerant pins
- →VIN range for mobile robots often 6–24 V through onboard regulator
- →Do not assume VIN can feed servos directly
- →GPIO ~20–40 mA per pin — not motor current
- →Onboard 5 V/3.3 V rails often <1 A total
- →Servo stall current must not flow through MCU regulator
- →Raspberry Pi-style SBCs often need motor driver HATs/boards
- →Arduino/ESP32-style boards good for direct hardware control but have compute limits
- →Separate BEC/buck for actuators is standard practice
Software & controller
- →Arduino, PlatformIO, MicroPython, ESP-IDF ecosystem
- →ROS 2 on SBCs; micro-ROS on MCUs — not hard real-time on Pi alone
- →I/O count, PWM channels, and library support drive board choice
Mechanical
- →Form factor (Uno, Mega, credit-card SBC) affects enclosure
- →HAT/shield stacking height and connector access
Buyer mismatch warnings
- Driving wheel motors directly from GPIO without a driver
- Powering servos from board 5 V regulator on multi-servo builds
- Pi-only stack without PWM co-processor for multi-joint arms
- Clone boards with incorrect regulators or pinout errors
Emergency substitution notes
- →Match PWM pin count, logic voltage, and programming cable before buying substitute board
- →Verify motor driver compatibility with chosen GPIO pins
Open research gaps
- PWM channel count matrix per board class · Partial
Product-specific compatibility still needs verification.
Full cross-component view: Compatibility overview
EAR does not currently verify live stock or delivery speed. Use this guide to avoid ordering the wrong part, then verify stock, shipping, compatibility, and datasheets with the supplier before purchase.
EAR does not currently verify live stock or delivery speed. Use this guide to avoid ordering the wrong part, then verify stock, shipping, compatibility, and datasheets with the supplier before purchase.
Guide: general guidanceNeeds live supplier check
Urgency summary
A rush-purchased board fails when PWM count, logic voltage, software stack, or form factor do not match what the robot already expects.
Check stock and shipping live before ordering.
Urgent questions
- →What processor/controller family does the project expect?
- →How many PWM/GPIO/I2C/SPI/UART/CAN ports are needed?
- →What voltage logic level is required?
- →Does the project need Arduino, Python, ROS, or vendor library support?
- →Does it need Wi-Fi/Bluetooth?
- →Does it need to fit an existing shield/HAT/carrier?
- →Does it need same-day/local pickup?
Non-negotiable specs
- →Processor / controller family expected by project
- →GPIO, PWM, I2C, SPI, UART, and CAN port count as needed
- →Logic voltage (3.3 V vs 5 V tolerant)
- →Arduino, Python, ROS, or vendor library support
- →Programming cable / USB connector
- →Shield, HAT, or carrier form-factor fit
- →Motor driver interface compatibility with chosen pins
Acceptable substitutions (category-level)
- →Board with more GPIO/PWM than minimum if libraries match
- →Teensy for tighter timing if pinout and voltage fit
- →ESP32 when Wi-Fi teleop needed and pins sufficient
Dangerous substitutions
- Replacing Arduino-compatible board with SBC without matching libraries
- Wrong logic voltage
- Not enough PWM outputs
- No driver/library support
- Missing USB/programming cable
- Assuming board can power motors directly
Suppliers to check first
Digi-Key · supplier targetMouser Electronics · supplier targetSparkFun · supplier targetAdafruit · supplier targetPololu · supplier targetMicro Center · supplier targetAmazon · marketplace caution
Full supplier directory →Local pickup targets (verify stock)
- →Micro Center — Pi/Arduino/ESP32; verify store stock online before driving
Marketplace cautions
- →Amazon: clone boards may have wrong regulators or pin conflicts
- →Verify seller ships genuine board with documented pinout
Before you order
- →Download pinout and schematic before purchase
- →Confirm motor driver compatibility with chosen GPIO pins
- →Buy USB cable rated for Pi/SBC current if applicable
- →Plan separate BEC/rail for servos — not MCU 5 V pin
After arrival — bench test
- →Flash blink example before wiring actuators
- →Verify PWM on one pin with servo or scope
- →Check 3.3 V/5 V rails under expected load
If you get it wrong
- →Cannot generate enough PWM channels
- →Brownout when servos move
- →GPIO damage from back-driving motors
- →Software stack incompatible with team codebase
Open research gaps
- Same-day store inventory · Not live in EAR
Arduino Uno: easy PWM servos, limited RAM. ESP32: Wi-Fi + RTOS, watch pin strapping. Raspberry Pi: vision/ROS, add HAT for PWM and drivers. Match logic levels to sensors and drivers.
7 manufacturers tracked — expand for chips and dossier links.
EAR does not currently show live inventory. Always verify stock, shipping speed, compatibility, and authorized-channel status before ordering.
EAR does not currently show live inventory. Always verify stock, shipping speed, compatibility, and authorized-channel status before ordering.
Best sources to check first for controller boards
Edu/hobby retailers carry Arduino, ESP32, and Pi — verify stock before ordering. Micro Center may offer store pickup where locations exist; confirm local inventory live. Competition controllers are ecosystem-specific.
Check first
- •SparkFun
- •Adafruit
- •Pololu
- •Micro Center
Also check
- •Digi-Key
- •Mouser Electronics
- •Newark
- •REV Robotics
- •VEX Robotics
Use with caution
- •Amazon
- •AliExpress
- •eBay
SparkFun
SupplierHobby supplierU.S. shipping: typically availableOvernight: shipping needs live checkAuthorized status unknown
Supported categories
controller boardsmotor driversservossensorskits
Curated edu/hobby boards with tutorials
Buyer caution
Not an industrial authorized distributor for OEM lines
Supplier target
Verify stock and shipping before ordering.
Adafruit
SupplierHobby supplierU.S. shipping: typically availableOvernight: shipping needs live checkAuthorized status unknown
Supported categories
controller boardsmotor driversservossensorspower
Well-documented boards and drivers
Buyer caution
Not suited for heavy industrial actuators
Supplier target
Verify stock and shipping before ordering.
Pololu
SupplierRobotics specialistU.S. shipping: typically availableOvernight: shipping needs live checkAuthorized status unknown
Supported categories
servosmotor driverscontroller boardskitsmechanical
Likely category source for hobby servos and motor driver modules
Buyer caution
Not industrial OEM authorized distributor
Supplier target
Verify stock and shipping before ordering.
Micro Center
SupplierGeneral retailerU.S. shipping: typically availableOvernight: shipping needs live checkSame-day pickup: store locations onlyAuthorized status unknown
Supported categories
controller boardskits
Same-day pickup where stores exist — verify local stock
Buyer caution
Store footprint limited — not nationwide robotics coverage
Same-day pickup — store stock only
Verify stock and shipping before ordering.
Digi-Key
SupplierAuthorized distributorU.S. shipping: typically availableOvernight: varies by itemAuthorized: partial — verify by manufacturer
Supported categories
controller boardsmotor driversservosactuatorspowerconnectorssensorslidarcamerasimus
Broad authorized catalog for semiconductors and modules
Buyer caution
Not optimized for hobby servo bundles — check robotics specialists first
Shipping verification needed
Verify stock and shipping before ordering.
Mouser Electronics
SupplierAuthorized distributorU.S. shipping: typically availableOvernight: varies by itemAuthorized: partial — verify by manufacturer
Supported categories
controller boardsmotor driversservosactuatorspowerconnectorssensorslidarcamerasimus
Wide semiconductor and module selection
Buyer caution
Less hobby-robotics curated than Pololu or ServoCity
Shipping verification needed
Verify stock and shipping before ordering.
REV Robotics
SupplierEducation / competitionU.S. shipping: typically availableOvernight: shipping needs live checkAuthorized: partial — verify by manufacturer
Supported categories
controller boardsmotor driversservoskits
Competition-legal controllers and motor controllers
Buyer caution
Ecosystem locked to competition rules — not general-purpose only
Competition controllers
Verify stock and shipping before ordering.
VEX Robotics
SupplierEducation / competitionU.S. shipping: typically availableOvernight: shipping needs live checkAuthorized: partial — verify by manufacturer
Supported categories
controller boardsservosmotor driverskits
Closed ecosystem simplifies compatibility within VEX platforms
Buyer caution
Parts often incompatible outside VEX ecosystem
Closed ecosystem
Verify stock and shipping before ordering.
Amazon
SupplierMarketplaceU.S. shipping: typically availableOvernight: varies by itemMarketplace mixed authority
Supported categories
servoscontroller boardsmotor driverskitspower
Fast shipping sometimes available on Prime listings — not guaranteed
Buyer caution
Marketplace mixed authority — Marketplace mixed authority — counterfeit and mislabeled parts are a real risk
Marketplace — verify seller
Verify stock and shipping before ordering.
Browse all suppliers in the Supplier Directory. See what works together in the Compatibility Matrix.
Overnight availability needs live supplier verification. EAR does not track live inventory.
STOCK & SHIPPING
Overnight availability: needs live supplier verification. EAR does not track live inventory.
For rush-order decision checklists, see Emergency sourcing guide above.
Likely supplier targets to check first
See Who sells it above for supplier targets and sourcing guidance — then verify stock and shipping live before ordering.
Emergency sourcing checklist
- □Confirm PWM pin count vs servo count
- □Buy compatible motor driver for wheel motors
- □Separate BEC for servos if using Arduino
- □Check Micro Center for local Pi/Arduino — verify stock online
- □Download pinout before leaving store
Brownout from servo current on MCU rail
- ×Brownout from servo current on MCU rail
- ×SD card corruption on Pi from hard power cuts
- ×GPIO burn from back-driving motors
- ×Wi-Fi dropouts blocking teleop on ESP32 if not handled
Replacement parts risk
Boards are replaceable; custom firmware and wiring harness time is the hidden cost.
SBCs are not real-time motor controllers without careful architecture. Do not power servos from the board's 5 V regulator on multi-servo builds.
SBCs are not real-time motor controllers without careful architecture. Do not power servos from the board's 5 V regulator on multi-servo builds.
- !Clone boards with incorrect voltage regulators
- !Pi-only stack without level shifters on 5 V sensors
- !Underspecifying USB cable for Pi current
- !Mixing competition legal restrictions without checking rules
- Industrial PLC / robot OEM controller for production
- FPGA for specialized I/O
OPEN RESEARCH GAPSBoard taxonomy seeded — SKU pricing pending
pricing
Board class USD bands
CURRENT STATUS
Needs sourced range
NEXT EVIDENCE TARGET
Digi-Key / Adafruit reference listings
sourcing
Servo count per board matrix
CURRENT STATUS
Partial
NEXT EVIDENCE TARGET
PCA9685 and timer channel maps